<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.7.14/dist/vue.js"></script>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css"
    integrity="sha384-xOolHFLEh07PJGoPkLv1IbcEPTNtaed2xpHsD9ESMhqIYd0nLMwNLD69Npy4HI+N" crossorigin="anonymous">
  <style>
    .red {
      color: red;
    }
  </style>
</head>

<body>
  <div id="app">
    <div class="container">
      <!-- 顶部框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody>
          <tr v-for="item in list" :key="item.id">
            <td>{{ item.id }}</td>
            <td>{{ item.name }}</td>
            <!-- 如果价格超过100，就有red这个类 -->
            <td :class="{red: item.price > 100}">{{ item.price }}</td>
            <td>{{ item.time }}</td>
            <td><a href="#" @click="del(item.id)">删除</a></td>
          </tr>
        </tbody>
        <tfoot v-show="list.length === 0">
          <tr>
            <td colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
      </table>

      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input type="text" class="form-control" placeholder="资产名称" v-model="name" />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input type="text" class="form-control" placeholder="价格" v-model.number="price" />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <button class="btn btn-primary" @click.prevent="add">添加资产</button>
      </form>
    </div>
  </div>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        name: "", // 名称
        price: 0, // 价格
        list: [{
            id: 100,
            name: "外套",
            price: 199,
            time: new Date('2010-08-12')
          },
          {
            id: 101,
            name: "裤子",
            price: 34,
            time: new Date('2013-09-01')
          },
          {
            id: 102,
            name: "鞋",
            price: 25.4,
            time: new Date('2018-11-22')
          },
          {
            id: 103,
            name: "头发",
            price: 19900,
            time: new Date('2020-12-12')
          }
        ]
      },
      methods: {
        add() {
          if (this.name.trim().length === 0 || this.price === 0) return alert("不能为空")

          // 解决bug: 无数组新增-list没有数据, id需要给一个固定值(以后id都是后台生成, 现在是模拟给一个id)
          let id = this.list.length > 0 ? this.list[this.list.length - 1].id + 1 : 100

          this.list.push({
            // 当前数组最后一个对象的id+1作为新对象id值
            id: id,
            name: this.name,
            price: this.price,
            time: new Date()
          })
        },
        del(id) {
          // 通过id找到这条数据在数组中下标
          this.list = this.list.filter(item => item.id !== id)
        }
      }
    })
  </script>
</body>

</html>